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Apache East Spar

Apache East Spar


Landmark: Asia’s first spar used on a subsea development

The development consists of an initial two wells followed by an additional well which was completed at a later date. The system is designed to produce 100 mmcf/d of natural gas, which is exported by a 14" pipeline to a terminal on Varanus Island, 39 miles (63 km) away from the subsea development.

The requirement for a very long umbilical was eliminated by the innovative solution of controlling the subsea wells via a communications buoy on the field, which also provides chemical injection. Further innovations used on this project included two subsea multiphase flowmeters, a subsea corrosion monitoring system and two subsea heat exchangers to cool the produced fluid. Production from the field began in November 1996, one month earlier than planned.

  • Three horizontal 5"x2" 5,000 psi subsea trees
  • One UWD-15 wellhead system
  • Four 7" tubing hangers
  • Radial penetrations for surface-controlled subsurface safety valves (SCSSV) and downhole pressure/temperature monitor (DHPTM)
  • System integration testing, installation assistance, service and maintenance